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2025-04-28 00:58:08
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A378201 | a(n) = 2*n mod q, where q is the greatest prime such that 2*n - q is also prime. | [
"0",
"0",
"3",
"3",
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"3",
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"3",
"5",
"7",
"11",
"11",
"3",
"3",
"5"
] | [
"nonn"
] | 7 | 2 | 3 | [
"A002373",
"A378201"
] | null | Michel Eduardo Beleza Yamagishi, Nov 19 2024 | 2024-12-03T12:47:09 | oeisdata/seq/A378/A378201.seq | 8159df9424ad8613f737d5b89f02aa3f |
A378202 | Largest primitive practical number that divides the n-th practical number - A005153(n). | [
"1",
"2",
"2",
"6",
"2",
"6",
"2",
"6",
"20",
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"28",
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"348",
"88",
"30",
"364",
"368",
"42",
"380",
"6",
"390",
"28",
"66"
] | [
"nonn"
] | 6 | 1 | 2 | [
"A005153",
"A267124",
"A377377",
"A378202"
] | null | Frank M Jackson, Nov 19 2024 | 2024-11-20T09:51:22 | oeisdata/seq/A378/A378202.seq | 89e1d6faf4a7e22462a0cb7e8da4db19 |
A378203 | Number of palindromic n-ary words of length n that include the last letter of their respective alphabet. | [
"1",
"1",
"1",
"5",
"7",
"61",
"91",
"1105",
"1695",
"26281",
"40951",
"771561",
"1214423",
"26916709",
"42664987",
"1087101569",
"1732076671",
"49868399761",
"79771413871",
"2560599031177",
"4108933742199",
"145477500542221",
"234040800869107",
"9059621800971105",
"14605723004036255",
"613627780919407801"
] | [
"nonn",
"easy"
] | 19 | 0 | 4 | [
"A045531",
"A047969",
"A248828",
"A252764",
"A292845",
"A378203"
] | null | John Tyler Rascoe, Nov 19 2024 | 2024-11-21T22:27:54 | oeisdata/seq/A378/A378203.seq | f928c8e67d53c3589f9c7a47158097cb |
A378204 | Decimal expansion of the surface area of a triakis tetrahedron with unit shorter edge length. | [
"5",
"5",
"2",
"7",
"7",
"0",
"7",
"9",
"8",
"3",
"9",
"2",
"5",
"6",
"6",
"6",
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"3",
"0",
"7",
"7",
"8",
"4",
"8",
"0",
"7",
"2",
"3",
"3"
] | [
"nonn",
"cons",
"easy"
] | 13 | 1 | 1 | [
"A010468",
"A377274",
"A378204",
"A378205",
"A378206",
"A378207",
"A378208"
] | null | Paolo Xausa, Nov 20 2024 | 2025-02-11T14:40:12 | oeisdata/seq/A378/A378204.seq | abc683275ee3de47298b92193fe58cf6 |
A378205 | Decimal expansion of the volume of a triakis tetrahedron with unit shorter edge length. | [
"9",
"8",
"2",
"0",
"9",
"2",
"7",
"5",
"1",
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"4",
"4",
"3",
"6",
"4",
"6",
"1",
"0",
"2",
"4",
"5",
"4"
] | [
"nonn",
"cons",
"easy"
] | 11 | 0 | 1 | [
"A002193",
"A377275",
"A378204",
"A378205",
"A378206",
"A378207",
"A378208"
] | null | Paolo Xausa, Nov 20 2024 | 2025-02-11T14:40:41 | oeisdata/seq/A378/A378205.seq | f40f01cd7d334686ec4a89aaab494fd5 |
A378206 | Decimal expansion of the inradius of a triakis tetrahedron with unit shorter edge length. | [
"5",
"3",
"3",
"0",
"0",
"1",
"7",
"9",
"0",
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"9",
"8",
"6",
"6",
"0",
"4",
"0",
"4",
"5"
] | [
"nonn",
"cons",
"easy"
] | 8 | 0 | 1 | [
"A010539",
"A378204",
"A378205",
"A378206",
"A378207",
"A378208"
] | null | Paolo Xausa, Nov 21 2024 | 2025-02-11T14:40:50 | oeisdata/seq/A378/A378206.seq | 8cd2991af7e11e2c26461e48b53d38ca |
A378207 | Decimal expansion of the midradius of a triakis tetrahedron with unit shorter edge length. | [
"5",
"8",
"9",
"2",
"5",
"5",
"6",
"5",
"0",
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"1",
"8",
"7",
"6",
"6",
"1",
"4",
"7",
"2"
] | [
"nonn",
"cons",
"easy"
] | 10 | 0 | 1 | [
"A010524",
"A093577",
"A378204",
"A378205",
"A378206",
"A378207",
"A378208"
] | null | Paolo Xausa, Nov 21 2024 | 2025-02-11T09:56:10 | oeisdata/seq/A378/A378207.seq | e93b0e69caa679930f920b86f23d8f83 |
A378208 | Decimal expansion of the dihedral angle, in radians, between any two adjacent faces in a triakis tetrahedron. | [
"2",
"2",
"6",
"0",
"5",
"7",
"1",
"3",
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"9",
"2",
"3"
] | [
"nonn",
"cons",
"easy"
] | 10 | 1 | 1 | [
"A137914",
"A156546",
"A378204",
"A378205",
"A378206",
"A378207",
"A378208"
] | null | Paolo Xausa, Nov 21 2024 | 2025-02-11T14:41:05 | oeisdata/seq/A378/A378208.seq | 81f794da5e7d7b15b81c5ed7467b717b |
A378209 | Antiderivatives of 334406399, numbers k for which A003415(k) = A024451(9) = A003415(A002110(9)). | [
"223092870",
"975351895",
"1527890095",
"1885679383",
"2189118743",
"2329696457",
"2338611863",
"3485765789",
"4586671213",
"5453593183",
"5472849253",
"5674340053",
"8071055747",
"8931775397",
"9332889127",
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"9601098443",
"10293819917",
"12717530039",
"17343441881",
"18636581773",
"19498393573",
"20167656703",
"23244839627",
"23515890737",
"23556538969"
] | [
"nonn",
"full",
"fini"
] | 21 | 1 | 1 | [
"A002110",
"A003415",
"A024451",
"A046389",
"A099307",
"A099308",
"A327969",
"A369239",
"A369450",
"A369451",
"A369452",
"A369651",
"A377992",
"A378209"
] | null | Antti Karttunen, Nov 20 2024 | 2024-11-22T20:32:22 | oeisdata/seq/A378/A378209.seq | 9da857428298f4a44596d3fb01271e4a |
A378210 | Dirichlet inverse of A191150, hypersigma variant 1. | [
"1",
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"-4",
"-1",
"-6",
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"-8",
"5",
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"-68",
"92",
"68",
"75",
"-72",
"-183",
"-74",
"73"
] | [
"sign"
] | 6 | 1 | 2 | [
"A191150",
"A378210",
"A378211"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-22T13:31:49 | oeisdata/seq/A378/A378210.seq | f7668201cced40c5074fe155e981c9c2 |
A378211 | Dirichlet inverse of A191161, hypersigma variant 2. | [
"1",
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"18",
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"-222",
"-69",
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"123",
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"-75"
] | [
"sign"
] | 6 | 1 | 2 | [
"A191161",
"A378210",
"A378211"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-22T13:31:53 | oeisdata/seq/A378/A378211.seq | 9b2c23a78db899c32cd4a68e0ce2a2e9 |
A378212 | a(n) is the greatest nonnegative integer k such that there exists a strictly increasing integer sequence k = b_1 < b_2 < ... < b_t = n with the property that b_1 XOR b_2 XOR ... XOR b_t = 0, or 0 if there are no such k (when n is a power of 2). | [
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"72",
"67",
"74",
"73",
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] | [
"nonn"
] | 17 | 0 | 6 | [
"A131577",
"A348296",
"A359506",
"A378212"
] | null | Peter Kagey and Antti Karttunen, Nov 25 2024 | 2024-11-30T12:57:10 | oeisdata/seq/A378/A378212.seq | fa3250d40524386e63f3e5a9bd9b28a0 |
A378213 | Dirichlet inverse of A140773. | [
"1",
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"-2",
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"1"
] | [
"sign"
] | 7 | 1 | 2 | [
"A140773",
"A378213",
"A378214",
"A378215"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-22T11:01:11 | oeisdata/seq/A378/A378213.seq | dfd326f978e8e249ec0f8dde61e148d7 |
A378214 | Dirichlet inverse of A369255, where A369255(n) = A140773(n) mod 2. | [
"1",
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"-1",
"-1",
"-1",
"1",
"0",
"0",
"0",
"1"
] | [
"sign"
] | 6 | 1 | 60 | [
"A140773",
"A369255",
"A378213",
"A378214",
"A378215"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-22T11:01:18 | oeisdata/seq/A378/A378214.seq | 3d5c2c8903091c6127c3d01bc81af548 |
A378215 | Parity of A378213, where A378213 is the Dirichlet inverse of A140773. | [
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"0",
"0",
"1",
"0",
"0",
"1",
"1",
"0",
"0"
] | [
"nonn"
] | 7 | 1 | null | [
"A140773",
"A369255",
"A378213",
"A378214",
"A378215"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-22T11:01:28 | oeisdata/seq/A378/A378215.seq | 996bdee906bf7fd55116f448063b2860 |
A378216 | Dirichlet inverse of A174725. | [
"1",
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"-1",
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"-2",
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"-2",
"-1",
"-2",
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"-2",
"-6",
"0",
"-8",
"-3",
"-2",
"0",
"-10"
] | [
"sign"
] | 15 | 1 | 6 | [
"A000005",
"A023900",
"A033879",
"A070824",
"A174725",
"A344587",
"A378216",
"A378220"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-23T10:45:09 | oeisdata/seq/A378/A378216.seq | 6fd4bdd0f1640cab7c88b087a355066c |
A378217 | Dirichlet inverse of A330575. | [
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"-72",
"-2",
"-74",
"112",
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"-18",
"94"
] | [
"sign"
] | 6 | 1 | 2 | [
"A330575",
"A378217"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-22T20:32:53 | oeisdata/seq/A378/A378217.seq | 14dc1b4a1a38c0f55267ae8d52ff662c |
A378218 | Dirichlet inverse of A345182. | [
"1",
"0",
"-1",
"-1",
"-1",
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"-2",
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"-2",
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"-1",
"-2",
"-1",
"-3",
"-1",
"-2",
"-1",
"-5"
] | [
"sign"
] | 8 | 1 | 6 | [
"A345182",
"A359508",
"A378218"
] | null | Antti Karttunen, Nov 22 2024 | 2024-11-22T20:32:27 | oeisdata/seq/A378/A378218.seq | 9cac3aaf749a81d1b24812ac27a66344 |
A378219 | Dirichlet inverse of A253249. | [
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"-3",
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"7",
"-3",
"8",
"7",
"7",
"7",
"0",
"-3",
"8",
"7"
] | [
"sign"
] | 6 | 1 | 2 | [
"A074206",
"A253249",
"A378219"
] | null | Antti Karttunen, Nov 23 2024 | 2024-11-23T10:45:13 | oeisdata/seq/A378/A378219.seq | b73016d92d89588076c561b844b14d52 |
A378220 | Dirichlet inverse of phi(A003961(n)), where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1). | [
"1",
"-2",
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"112",
"-120",
"-72",
"8",
"-78",
"80",
"24"
] | [
"sign",
"mult"
] | 20 | 1 | 2 | [
"A003961",
"A003972",
"A023900",
"A048673",
"A151800",
"A346234",
"A346246",
"A349385",
"A378216",
"A378220"
] | null | Antti Karttunen, Nov 23 2024 | 2025-01-13T01:39:05 | oeisdata/seq/A378/A378220.seq | db98272f73e8826f475bd2e223783e59 |
A378221 | Dirichlet inverse of sigma(A003961(n)), where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1). | [
"1",
"-4",
"-6",
"3",
"-8",
"24",
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"144",
"-336",
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"-60",
"180",
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"0"
] | [
"sign",
"mult"
] | 14 | 1 | 2 | [
"A003961",
"A003973",
"A046692",
"A151800",
"A346234",
"A378220",
"A378221"
] | null | Antti Karttunen, Nov 23 2024 | 2025-01-13T01:29:18 | oeisdata/seq/A378/A378221.seq | e4db0f6a9407eae3ef731c162767a51b |
A378222 | Number of ordered factorizations of the odd part of n into factors > 1. | [
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
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"1",
"2",
"8",
"2",
"1",
"3",
"1",
"1",
"13"
] | [
"nonn"
] | 8 | 1 | 9 | [
"A000265",
"A074206",
"A352063",
"A378222"
] | null | Antti Karttunen, Nov 24 2024 | 2024-11-24T13:48:41 | oeisdata/seq/A378/A378222.seq | b1116cf77310d1414e78979599e80e75 |
A378223 | Inverse Möbius transform of A345182. | [
"1",
"1",
"2",
"2",
"2",
"4",
"2",
"4",
"4",
"4",
"2",
"10",
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"100",
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"20",
"2",
"56",
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"2",
"62",
"6",
"4",
"6",
"24",
"2",
"72",
"6",
"10",
"6",
"4",
"6"
] | [
"nonn"
] | 12 | 1 | 3 | [
"A002131",
"A067824",
"A278223",
"A323910",
"A345182",
"A378223",
"A378224"
] | null | Antti Karttunen, Nov 25 2024 | 2024-11-30T23:46:12 | oeisdata/seq/A378/A378223.seq | c79f6aa0f5ea1c0bc644a5099b40225c |
A378224 | Dirichlet inverse of A378223. | [
"1",
"-1",
"-2",
"-1",
"-2",
"0",
"-2",
"-1",
"0",
"0",
"-2",
"0",
"-2",
"0",
"2",
"-1",
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"-2",
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"-2",
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"2",
"0",
"-2",
"0",
"2",
"0",
"2",
"0",
"2",
"0",
"-2"
] | [
"sign"
] | 8 | 1 | 3 | [
"A008683",
"A345182",
"A378218",
"A378223",
"A378224",
"A378225"
] | null | Antti Karttunen, Nov 25 2024 | 2024-11-25T16:34:57 | oeisdata/seq/A378/A378224.seq | 693b0133b2a4603215b0f85dbbcf0ec8 |
A378225 | Dirichlet inverse of A067824. | [
"1",
"-2",
"-2",
"0",
"-2",
"2",
"-2",
"0",
"0",
"2",
"-2",
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"0",
"-2",
"0",
"2",
"0",
"2",
"2",
"2",
"0",
"-2"
] | [
"sign"
] | 7 | 1 | 2 | [
"A008683",
"A067824",
"A153881",
"A378224",
"A378225"
] | null | Antti Karttunen, Nov 25 2024 | 2024-11-25T13:30:54 | oeisdata/seq/A378/A378225.seq | e3a9434fd30c412d3bc95b7e15ed46c1 |
A378226 | XOR-Moebius transform of A318457, where A318457(n) = n XOR (sigma(n)-n). | [
"1",
"2",
"3",
"4",
"5",
"0",
"7",
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"103",
"56",
"83",
"36",
"79",
"48",
"111",
"84",
"83"
] | [
"nonn"
] | 10 | 1 | 2 | [
"A000203",
"A001065",
"A003987",
"A318457",
"A378226",
"A378227",
"A378230",
"A378441"
] | null | Antti Karttunen, Nov 26 2024 | 2024-11-26T15:21:48 | oeisdata/seq/A378/A378226.seq | b0ae5e354fa842640af55b119952e35b |
A378227 | XOR-Moebius transform of A318467, where A318467(n) = 2*n XOR sigma(n). | [
"3",
"4",
"1",
"8",
"15",
"6",
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"193",
"140",
"221",
"102",
"197",
"72",
"219",
"142",
"205",
"108"
] | [
"nonn"
] | 10 | 1 | 1 | [
"A000203",
"A003987",
"A083254",
"A256739",
"A296203",
"A318467",
"A378226",
"A378227"
] | null | Antti Karttunen, Nov 26 2024 | 2024-11-26T11:47:56 | oeisdata/seq/A378/A378227.seq | 63b496aaadaf5e0d6830082cebecd6a3 |
A378228 | Dirichlet inverse of A341528, where A341528(n) = n * sigma(A003961(n)), and A003961 is fully multiplicative with a(prime(i)) = prime(i+1). | [
"1",
"-8",
"-18",
"12",
"-40",
"144",
"-84",
"0",
"45",
"320",
"-154",
"-216",
"-234",
"672",
"720",
"0",
"-340",
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"-456",
"-480",
"1512",
"1232",
"-690",
"0",
"175",
"1872",
"0",
"-1008",
"-928",
"-5760",
"-1178",
"0",
"2772",
"2720",
"3360",
"540",
"-1554",
"3648",
"4212",
"0",
"-1804",
"-12096",
"-2064",
"-1848",
"-1800",
"5520",
"-2538",
"0",
"539",
"-1400",
"6120",
"-2808",
"-3180",
"0",
"6160",
"0",
"8208",
"7424"
] | [
"sign",
"mult"
] | 8 | 1 | 2 | [
"A003973",
"A341528",
"A378221",
"A378228",
"A378229"
] | null | Antti Karttunen, Nov 23 2024 | 2024-11-24T09:29:25 | oeisdata/seq/A378/A378228.seq | 04b904292d3779e2bbc861faae0d7e36 |
A378229 | Dirichlet inverse of A341529, where A341529(n) = sigma(n) * A003961(n), and A003961 is fully multiplicative with a(prime(i)) = prime(i+1). | [
"1",
"-9",
"-20",
"18",
"-42",
"180",
"-88",
"0",
"75",
"378",
"-156",
"-360",
"-238",
"792",
"840",
"0",
"-342",
"-675",
"-460",
"-756",
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"-2205",
"6840",
"-4284",
"-3186",
"0",
"6552",
"0",
"9200",
"8370"
] | [
"sign",
"mult"
] | 8 | 1 | 2 | [
"A341529",
"A378228",
"A378229"
] | null | Antti Karttunen, Nov 23 2024 | 2024-11-24T09:29:32 | oeisdata/seq/A378/A378229.seq | 592c50ca028ace71ad606862e7f497e2 |
A378230 | Positions of 0's in A378226, where A278226 is XOR-Moebius transform of A318457, and A318457(n) = n XOR (sigma(n)-n). | [
"6",
"14",
"28",
"42",
"50",
"62",
"72",
"114",
"124",
"150",
"186",
"248",
"254",
"376",
"402",
"412",
"426",
"434",
"474",
"496",
"498",
"508",
"762",
"784",
"786",
"796",
"868",
"938",
"978",
"994",
"1002",
"1016",
"1302",
"1528",
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"1578",
"1626",
"1778",
"1834",
"1852",
"1888",
"1948",
"1988",
"2032",
"3056",
"3064",
"3094",
"3282",
"3350",
"3556",
"3568",
"3644",
"3682",
"3794",
"3858",
"3868",
"3882",
"3954",
"4064"
] | [
"nonn"
] | 7 | 1 | 1 | [
"A000396",
"A001065",
"A318457",
"A378226",
"A378230"
] | null | Antti Karttunen, Nov 26 2024 | 2024-11-26T15:21:52 | oeisdata/seq/A378/A378230.seq | bebef2a7385ccd59f0f083e62a87cb06 |
A378231 | Deficiency of prime-shifted squares: a(n) = 2*A003961(n^2) - sigma(A003961(n^2)), where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1). | [
"1",
"5",
"19",
"41",
"41",
"47",
"109",
"365",
"469",
"141",
"155",
"299",
"271",
"449",
"683",
"3281",
"341",
"1097",
"505",
"1041",
"1927",
"663",
"811",
"2567",
"2001",
"1211",
"11719",
"3509",
"929",
"-921",
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"29525",
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"1545",
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"6749",
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"2333",
"4933",
"9141",
"1805",
"851",
"2161",
"5235",
"16733",
"3815",
"2755",
"22979",
"13177",
"6805",
"6239",
"9671",
"3421",
"27347",
"6131",
"31049"
] | [
"sign"
] | 10 | 1 | 2 | [
"A000203",
"A003961",
"A003973",
"A033879",
"A337339",
"A344587",
"A377879",
"A378231"
] | null | Antti Karttunen, Nov 23 2024 | 2024-11-23T19:37:34 | oeisdata/seq/A378/A378231.seq | 5e3fddcb23b4d8133b5c5bf2a2b36c4f |
A378232 | Cardinality of the ramified symmetric inverse monoid R(IS_n). | [
"1",
"3",
"39",
"971",
"38140",
"2126890",
"157874467",
"14928602309",
"1741809491235",
"244735956424795",
"40624759074089024",
"7844197919242438656",
"1739438713163799330816",
"438224899712759850074112",
"124286842162679182383906816",
"39368769274679275493259214848",
"13831693583206759177535050743808"
] | [
"nonn"
] | 36 | 0 | 2 | null | null | Diego Arcis, Nov 21 2024 | 2024-11-22T08:56:49 | oeisdata/seq/A378/A378232.seq | dbac6cfb12fdffe4c7b441bdf758c100 |
A378233 | a(1) = 1, a(2) = 2, let i = a(n-2), j = a(n-1). For n > 2, If i*j is a term in A055932, a(n) is the least novel multiple of the smallest prime which does not divide i*j. Otherwise a(n) is the least novel multiple of the greatest prime < Gpf(i*j) which does not divide i*j. | [
"1",
"2",
"3",
"5",
"4",
"6",
"10",
"7",
"9",
"15",
"8",
"14",
"20",
"12",
"21",
"25",
"16",
"18",
"30",
"28",
"11",
"35",
"24",
"22",
"42",
"40",
"33",
"49",
"45",
"26",
"44",
"56",
"50",
"27",
"63",
"55",
"32",
"70",
"36",
"66",
"77",
"60",
"13",
"88",
"84",
"65",
"99",
"91",
"75",
"110",
"98",
"39",
"121",
"105",
"34",
"52",
"132",
"112",
"80",
"48",
"119",
"78",
"143",
"126",
"85",
"104"
] | [
"nonn",
"look"
] | 19 | 1 | 2 | [
"A000027",
"A000040",
"A002110",
"A006530",
"A055932",
"A098550",
"A359804",
"A377774",
"A378233"
] | null | David James Sycamore and Michael De Vlieger, Nov 20 2024 | 2024-11-24T09:37:27 | oeisdata/seq/A378/A378233.seq | 51868ad4115672f5e38db293817230ac |
A378234 | From higher-order arithmetic progressions: Corrected version of A259461. | [
"40",
"5000",
"472500",
"43218000",
"4148928000",
"432081216000",
"49509306000000",
"6275893932000000",
"881135508052800000",
"136878615942868800000",
"23474682634201999200000",
"4432282735129048800000000",
"918537831584839065600000000",
"208281986149676045967360000000",
"51516317681413623440962560000000"
] | [
"nonn"
] | 21 | 0 | 1 | [
"A001303",
"A006472",
"A259459",
"A259460",
"A259461",
"A378234"
] | null | Georg Fischer, Dec 16 2024 | 2024-12-17T03:24:11 | oeisdata/seq/A378/A378234.seq | 4d40f9901acad0f62122431b77b384be |
A378235 | Number of winning positions of Gordon Hamilton's Jumping Frogs game with single frogs, where the distance between the leftmost frog and the rightmost frog is equal to n. | [
"1",
"1",
"1",
"3",
"4",
"7",
"13",
"23",
"40",
"74",
"148",
"263",
"493",
"934",
"1719",
"3192",
"6035",
"11280",
"21252",
"40367",
"75796"
] | [
"nonn",
"more"
] | 9 | 0 | 4 | [
"A377232",
"A378004",
"A378235"
] | null | Pontus von Brömssen, Nov 20 2024 | 2024-11-21T05:22:31 | oeisdata/seq/A378/A378235.seq | 4b856068062fb258e398e06456529501 |
A378236 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(n+2*r+k,n)/(n+2*r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"2",
"0",
"1",
"4",
"8",
"0",
"1",
"6",
"20",
"44",
"0",
"1",
"8",
"36",
"120",
"280",
"0",
"1",
"10",
"56",
"236",
"800",
"1936",
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"1",
"12",
"80",
"400",
"1656",
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"14128",
"0",
"1",
"14",
"108",
"620",
"2960",
"12192",
"42416",
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"0",
"1",
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"22592",
"92960",
"326304",
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"0",
"1",
"18",
"176",
"1260",
"7440",
"38352",
"176800",
"727824",
"2572992",
"6652608",
"0"
] | [
"nonn",
"tabl"
] | 29 | 0 | 5 | [
"A000007",
"A033877",
"A071949",
"A346626",
"A378236",
"A378237",
"A378238",
"A378239",
"A378240"
] | null | Seiichi Manyama, Nov 20 2024 | 2024-11-21T11:15:24 | oeisdata/seq/A378/A378236.seq | d053534b6dc09ca22cc1f882efb6bf40 |
A378237 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(n+3*r+k,n)/(n+3*r+k) for k > 0. | [
"1",
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"1",
"2",
"0",
"1",
"4",
"10",
"0",
"1",
"6",
"24",
"74",
"0",
"1",
"8",
"42",
"188",
"642",
"0",
"1",
"10",
"64",
"350",
"1680",
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"0",
"1",
"12",
"90",
"568",
"3234",
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"60970",
"0",
"1",
"14",
"120",
"850",
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"154",
"1204",
"8450",
"54888",
"328426",
"1732172",
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"0",
"1",
"18",
"192",
"1638",
"12432",
"87402",
"574848",
"3494142",
"18728352",
"74958914",
"0"
] | [
"nonn",
"tabl"
] | 29 | 0 | 5 | [
"A000007",
"A033877",
"A071949",
"A349310",
"A378236",
"A378237",
"A378238",
"A378239",
"A378240"
] | null | Seiichi Manyama, Nov 20 2024 | 2024-11-21T11:14:55 | oeisdata/seq/A378/A378237.seq | 213ec0e5dbb3b12bb6b9b66820f351a5 |
A378238 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(3*n+r+k,n)/(3*n+r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"2",
"0",
"1",
"4",
"14",
"0",
"1",
"6",
"32",
"134",
"0",
"1",
"8",
"54",
"324",
"1482",
"0",
"1",
"10",
"80",
"578",
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"17818",
"0",
"1",
"12",
"110",
"904",
"6810",
"45316",
"226214",
"0",
"1",
"14",
"144",
"1310",
"11008",
"85278",
"583152",
"2984206",
"0",
"1",
"16",
"182",
"1804",
"16490",
"140936",
"1113854",
"7769348",
"40503890",
"0"
] | [
"nonn",
"tabl"
] | 33 | 0 | 5 | [
"A000007",
"A033877",
"A071949",
"A144097",
"A365843",
"A370102",
"A371675",
"A378236",
"A378237",
"A378238",
"A378239",
"A378240"
] | null | Seiichi Manyama, Nov 20 2024 | 2024-11-28T09:06:12 | oeisdata/seq/A378/A378238.seq | 4b6505d4daed616c3302d43bdf06489c |
A378239 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(2*n+2*r+k,n)/(2*n+2*r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"2",
"0",
"1",
"4",
"12",
"0",
"1",
"6",
"28",
"100",
"0",
"1",
"8",
"48",
"248",
"968",
"0",
"1",
"10",
"72",
"452",
"2480",
"10208",
"0",
"1",
"12",
"100",
"720",
"4680",
"26688",
"113792",
"0",
"1",
"14",
"132",
"1060",
"7728",
"51504",
"301648",
"1318832",
"0",
"1",
"16",
"168",
"1480",
"11800",
"87104",
"591312",
"3531424",
"15732064",
"0"
] | [
"nonn",
"tabl"
] | 32 | 0 | 5 | [
"A000007",
"A033877",
"A071949",
"A219534",
"A371693",
"A378155",
"A378156",
"A378236",
"A378237",
"A378238",
"A378239",
"A378240"
] | null | Seiichi Manyama, Nov 20 2024 based on suggestions from Mikhail Kurkov. | 2024-11-21T12:33:54 | oeisdata/seq/A378/A378239.seq | f552bab91ee6d7b02dc7c676f0744a60 |
A378240 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(3*n+3*r+k,n)/(3*n+3*r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"2",
"0",
"1",
"4",
"18",
"0",
"1",
"6",
"40",
"234",
"0",
"1",
"8",
"66",
"540",
"3570",
"0",
"1",
"10",
"96",
"926",
"8400",
"59586",
"0",
"1",
"12",
"130",
"1400",
"14706",
"141876",
"1053570",
"0",
"1",
"14",
"168",
"1970",
"22720",
"251622",
"2528760",
"19392490",
"0",
"1",
"16",
"210",
"2644",
"32690",
"394152",
"4524786",
"46815116",
"367677090",
"0"
] | [
"nonn",
"tabl"
] | 35 | 0 | 5 | [
"A000007",
"A033877",
"A071949",
"A364167",
"A378236",
"A378237",
"A378238",
"A378239",
"A378240"
] | null | Seiichi Manyama, Nov 20 2024 | 2024-11-21T12:33:39 | oeisdata/seq/A378/A378240.seq | c76f702b21f8c187c2a3535aeb0eac43 |
A378241 | Numbers of directed Hamiltonian cycles in the complete 4-partite graph K_{n,n,n,n}. | [
"6",
"1488",
"3667680",
"37744330752",
"1106491456512000",
"74213488705904640000",
"9872975878366503813120000",
"2355966665497190945783808000000",
"935825492908108988335792827924480000",
"584053924678169568704863421815848960000000"
] | [
"nonn"
] | 25 | 1 | 1 | [
"A209183",
"A234365",
"A369923",
"A377586",
"A378241"
] | null | Zlatko Damijanic, Nov 20 2024 | 2025-02-20T10:31:25 | oeisdata/seq/A378/A378241.seq | 16b5e949aec124732f128c5e06a5bffa |
A378242 | Lexicographically earliest sequence of nonnegative integers such that each term does not belong to a Fibonacci-like sequence starting with two earlier terms. | [
"0",
"1",
"4",
"6",
"11",
"19",
"24",
"27",
"29",
"36",
"50",
"66",
"71",
"92",
"105",
"112",
"114",
"117",
"122",
"140",
"154",
"170",
"179",
"186",
"196",
"201",
"218",
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"265",
"277",
"297",
"325",
"328",
"381",
"386",
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"441",
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"459",
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"471",
"481",
"501",
"513",
"523",
"544",
"592",
"607",
"614",
"624",
"681",
"701",
"715",
"753",
"775"
] | [
"nonn"
] | 8 | 1 | 3 | [
"A378242",
"A378243",
"A378244"
] | null | Rémy Sigrist, Nov 20 2024 | 2024-11-24T09:31:01 | oeisdata/seq/A378/A378242.seq | 3b2b3f4563fe17609ec6f697081c616d |
A378243 | a(n) is the least k > 0 such that n belongs to a Fibonacci-like sequence starting with initial values A378242(i) and A378242(j) for some i, j <= n. | [
"1",
"2",
"2",
"2",
"3",
"2",
"4",
"4",
"2",
"3",
"4",
"5",
"3",
"2",
"3",
"5",
"4",
"5",
"4",
"6",
"3",
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"6",
"12",
"5",
"4",
"6",
"12",
"13",
"7",
"5",
"7",
"13",
"10",
"9",
"4",
"6",
"7",
"8",
"9",
"8"
] | [
"nonn"
] | 7 | 0 | 2 | [
"A378242",
"A378243"
] | null | Rémy Sigrist, Nov 20 2024 | 2024-11-24T09:31:12 | oeisdata/seq/A378/A378243.seq | 53c41668c2e3bed084a6323978ccd85d |
A378244 | a(1) = 1, a(2) = 2, and for any n > 2, a(n) is the least number > a(n-1) that belongs to a unique Fibonacci-like sequence starting with two distinct earlier terms. | [
"1",
"2",
"4",
"7",
"10",
"13",
"25",
"30",
"39",
"42",
"54",
"57",
"98",
"101",
"119",
"122",
"134",
"150",
"165",
"174",
"183",
"202",
"224",
"229",
"247",
"264",
"295",
"311",
"326",
"347",
"382",
"391",
"399",
"413",
"472",
"475",
"503",
"520",
"543",
"566",
"583",
"617",
"669",
"675",
"728",
"734",
"848",
"859",
"959",
"976",
"1052",
"1080",
"1099",
"1108"
] | [
"nonn"
] | 6 | 1 | 2 | [
"A002858",
"A378242",
"A378244"
] | null | Rémy Sigrist, Nov 20 2024 | 2024-11-24T09:31:21 | oeisdata/seq/A378/A378244.seq | fd03ca95394353f91c2d013303c3aa67 |
A378245 | Numbers that are both k-gonal and (k+1)-gonal for some k >= 3. | [
"1",
"36",
"1225",
"9801",
"40755",
"41616",
"121771",
"297045",
"631125",
"1212751",
"1413721",
"2158695",
"3617601",
"5773825",
"8851275",
"13117251",
"18886285",
"26523981",
"36450855",
"48024900",
"49146175",
"65151801",
"85076025",
"94109401",
"109597411",
"139468635",
"175520325",
"218664901",
"269900415",
"330314391"
] | [
"nonn"
] | 38 | 1 | 2 | [
"A001110",
"A036353",
"A046180",
"A048903",
"A048906",
"A048924",
"A057145",
"A189216",
"A203627",
"A342300",
"A378245"
] | null | Kelvin Voskuijl, Nov 20 2024 | 2024-12-08T13:07:11 | oeisdata/seq/A378/A378245.seq | 90c2650082ddf37d1027fdcad5bfe9d3 |
A378246 | Integers that are equal to the product of their nonzero digits raised to their own power. | [
"1",
"1024",
"12500"
] | [
"nonn",
"base",
"bref",
"more"
] | 56 | 1 | 2 | [
"A002473",
"A046253",
"A061510",
"A378246"
] | null | Jason Hammerman, Nov 20 2024 | 2024-12-14T20:39:40 | oeisdata/seq/A378/A378246.seq | 47de3532723101bba7d16739b10463d3 |
A378247 | G.f. A(x) satisfies A(x)^2 = A( x^2 + 2*x*A(x)^2 + 2*A(x)^4 ). | [
"1",
"1",
"3",
"10",
"39",
"161",
"699",
"3135",
"14427",
"67716",
"322959",
"1560585",
"7624007",
"37593476",
"186856061",
"935214523",
"4709265692",
"23841104525",
"121275951719",
"619558165489",
"3177346503440",
"16351749778167",
"84419824808865",
"437105510426235",
"2269266695980449",
"11810014285000263",
"61602685079710638"
] | [
"nonn"
] | 7 | 1 | 3 | [
"A001190",
"A271959",
"A271960",
"A374566",
"A374567",
"A378247"
] | null | Paul D. Hanna, Nov 20 2024 | 2024-11-21T06:03:50 | oeisdata/seq/A378/A378247.seq | b447cad8743550eff249f87fe4733879 |
A378248 | Number of sets of chess pieces whose collective material value adds to n. | [
"1",
"1",
"1",
"3",
"3",
"4",
"7",
"7",
"9",
"14",
"15",
"18",
"25",
"27",
"32",
"42",
"45",
"52",
"66",
"71",
"81",
"99",
"106",
"120",
"143",
"153",
"171",
"200",
"214",
"237",
"273",
"291",
"320",
"364",
"387",
"423",
"476",
"505",
"549",
"612",
"648",
"701",
"775",
"819",
"882",
"969",
"1022",
"1096",
"1197",
"1260",
"1347",
"1463",
"1537",
"1638",
"1771",
"1858"
] | [
"nonn",
"easy"
] | 12 | 0 | 4 | [
"A029041",
"A378248"
] | null | David W. Ziegler, Nov 20 2024 | 2024-12-06T11:19:51 | oeisdata/seq/A378/A378248.seq | c15f2c7d2bdb0977e085585a95e4b821 |
A378249 | Least perfect power > prime(n). | [
"4",
"4",
"8",
"8",
"16",
"16",
"25",
"25",
"25",
"32",
"32",
"49",
"49",
"49",
"49",
"64",
"64",
"64",
"81",
"81",
"81",
"81",
"100",
"100",
"100",
"121",
"121",
"121",
"121",
"121",
"128",
"144",
"144",
"144",
"169",
"169",
"169",
"169",
"169",
"196",
"196",
"196",
"196",
"196",
"216",
"216",
"216",
"225",
"243",
"243",
"243",
"243",
"243",
"256",
"289",
"289",
"289"
] | [
"nonn"
] | 13 | 1 | 1 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A007918",
"A023055",
"A031218",
"A045542",
"A052410",
"A053289",
"A057820",
"A065514",
"A069623",
"A076411",
"A076412",
"A081676",
"A131605",
"A188951",
"A216765",
"A345531",
"A375706",
"A376559",
"A376562",
"A377283",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378035",
"A378249",
"A378250",
"A378251"
] | null | Gus Wiseman, Nov 21 2024 | 2024-12-19T10:25:06 | oeisdata/seq/A378/A378249.seq | a913d3e33357de3a26e9da939b2a6b8c |
A378250 | Perfect-powers x > 1 such that it is not possible to choose a prime y and a perfect-power z satisfying x > y > z. | [
"4",
"8",
"16",
"25",
"32",
"49",
"64",
"81",
"100",
"121",
"128",
"144",
"169",
"196",
"216",
"225",
"243",
"256",
"289",
"324",
"343",
"361",
"400",
"441",
"484",
"512",
"529",
"576",
"625",
"676",
"729",
"784",
"841",
"900",
"961",
"1000",
"1024",
"1089",
"1156",
"1225",
"1296",
"1331",
"1369",
"1444",
"1521",
"1600",
"1681",
"1728",
"1764",
"1849",
"1936"
] | [
"nonn"
] | 5 | 1 | 1 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A007918",
"A023055",
"A045542",
"A052410",
"A053289",
"A057820",
"A069623",
"A076411",
"A076412",
"A081676",
"A131605",
"A188951",
"A216765",
"A345531",
"A375706",
"A376559",
"A376562",
"A377283",
"A377431",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378035",
"A378249",
"A378250",
"A378251"
] | null | Gus Wiseman, Nov 21 2024 | 2024-11-21T19:11:15 | oeisdata/seq/A378/A378250.seq | bbe1bfd18c45e6fd1d2ecacf2eb48d6c |
A378251 | Number of primes between consecutive perfect powers, zeros omitted. | [
"2",
"2",
"2",
"3",
"2",
"4",
"3",
"4",
"3",
"5",
"1",
"3",
"5",
"5",
"3",
"1",
"5",
"1",
"7",
"5",
"2",
"4",
"6",
"7",
"7",
"5",
"2",
"6",
"9",
"8",
"7",
"8",
"9",
"8",
"8",
"6",
"4",
"9",
"10",
"9",
"10",
"7",
"2",
"9",
"12",
"11",
"12",
"6",
"5",
"9",
"12",
"11",
"3",
"10",
"8",
"2",
"13",
"15",
"10",
"11",
"15",
"7",
"9",
"12",
"13",
"11",
"12",
"17",
"2",
"11",
"16",
"16",
"13",
"17",
"15",
"14",
"16",
"15"
] | [
"nonn",
"look"
] | 22 | 1 | 1 | [
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A007918",
"A023055",
"A045542",
"A052410",
"A053289",
"A057820",
"A067871",
"A069623",
"A076411",
"A076412",
"A080769",
"A081676",
"A131605",
"A188951",
"A216765",
"A274605",
"A375706",
"A377057",
"A377283",
"A377431",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378035",
"A378249",
"A378250",
"A378251",
"A378253",
"A378355",
"A378356",
"A378365",
"A378373"
] | null | Gus Wiseman, Nov 23 2024 | 2025-01-25T03:23:40 | oeisdata/seq/A378/A378251.seq | fe1f6489be090e70d04e6b54a66b6f52 |
A378252 | Least prime power > 2^n. | [
"2",
"3",
"5",
"9",
"17",
"37",
"67",
"131",
"257",
"521",
"1031",
"2053",
"4099",
"8209",
"16411",
"32771",
"65537",
"131101",
"262147",
"524309",
"1048583",
"2097169",
"4194319",
"8388617",
"16777259",
"33554467",
"67108879",
"134217757",
"268435459",
"536870923",
"1073741827",
"2147483659",
"4294967311",
"8589934609"
] | [
"nonn"
] | 15 | 0 | 1 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A007918",
"A013597",
"A014210",
"A014234",
"A024619",
"A031218",
"A037035",
"A053707",
"A057820",
"A059305",
"A065514",
"A069584",
"A080101",
"A151800",
"A244508",
"A246655",
"A304521",
"A357751",
"A361102",
"A366833",
"A372683",
"A375708",
"A375735",
"A377051",
"A377282",
"A377283",
"A377289",
"A377432",
"A378249",
"A378252"
] | null | Gus Wiseman, Nov 30 2024 | 2024-12-03T08:40:49 | oeisdata/seq/A378/A378252.seq | 5194c5eee43d166053e3c7b88ca28852 |
A378253 | Perfect powers p such that there are no other perfect powers between p and the least prime > p. | [
"1",
"4",
"9",
"16",
"27",
"36",
"49",
"64",
"81",
"100",
"125",
"128",
"144",
"169",
"196",
"216",
"225",
"243",
"256",
"289",
"324",
"343",
"361",
"400",
"441",
"484",
"512",
"529",
"576",
"625",
"676",
"729",
"784",
"841",
"900",
"961",
"1000",
"1024",
"1089",
"1156",
"1225",
"1296",
"1331",
"1369",
"1444",
"1521",
"1600",
"1681",
"1728",
"1764",
"1849"
] | [
"nonn"
] | 8 | 1 | 2 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A052410",
"A053289",
"A067871",
"A069623",
"A076411",
"A076412",
"A080769",
"A081676",
"A131605",
"A188951",
"A216765",
"A345531",
"A375706",
"A377057",
"A377283",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378035",
"A378249",
"A378250",
"A378251",
"A378253",
"A378355",
"A378356"
] | null | Gus Wiseman, Nov 26 2024 | 2024-11-26T17:13:36 | oeisdata/seq/A378/A378253.seq | bcc2d1a1085e25b2db80468e6a46a68d |
A378254 | Cogrowth sequence of the 20-element group C10 X C2 = <S,T | S^10, T^2, [S,T]>. | [
"1",
"1",
"1",
"1",
"1",
"2",
"67",
"1002",
"8009",
"43759",
"184758",
"646878",
"1971883",
"5541966",
"16231216",
"60090032",
"290305577",
"1523150157",
"7564006759",
"34099637859",
"139541849878",
"526321168143",
"1878476551128",
"6603812572941",
"24052434515891",
"94278969044262",
"396750746960712"
] | [
"nonn",
"easy"
] | 6 | 0 | 6 | [
"A078789",
"A377627",
"A377840",
"A378254",
"C2",
"C6",
"C8",
"D10"
] | null | Sean A. Irvine, Nov 20 2024 | 2024-11-20T20:44:06 | oeisdata/seq/A378/A378254.seq | 64929468acd0f0acad803460324fbae6 |
A378255 | G.f. A(x) satisfies A(x) = x + A(A(x)^2) + A(A(x)^3). | [
"1",
"1",
"3",
"11",
"44",
"193",
"882",
"4178",
"20305",
"100694",
"507493",
"2591897",
"13384911",
"69773480",
"366661360",
"1940336952",
"10331179153",
"55306072496",
"297499878304",
"1607212566176",
"8716586959731",
"47440220540922",
"259021671704538",
"1418386679682870",
"7787843448380598",
"42865830110488341",
"236480195092162079"
] | [
"nonn"
] | 13 | 1 | 3 | [
"A141200",
"A378255"
] | null | Paul D. Hanna, Nov 23 2024 | 2024-11-24T09:32:09 | oeisdata/seq/A378/A378255.seq | 7ba592cfb9e731787cb433a8ab5dc8e6 |
A378256 | G.f. A(x) satisfies A(x) = A(x^3)/A(x^2) - x^2. | [
"1",
"-1",
"1",
"-1",
"0",
"-1",
"1",
"0",
"2",
"-1",
"2",
"-2",
"1",
"-2",
"0",
"-2",
"0",
"-1",
"2",
"0",
"1",
"-1",
"-4",
"-1",
"-4",
"2",
"-2",
"4",
"0",
"5",
"1",
"4",
"-2",
"0",
"-2",
"1",
"8",
"4",
"19",
"-2",
"20",
"-14",
"16",
"-24",
"19",
"-28",
"34",
"-28",
"45",
"-34",
"33",
"-50",
"6",
"-56",
"-6",
"-38",
"-3",
"-8",
"-12",
"14",
"-59",
"24",
"-119",
"51",
"-138",
"115",
"-116",
"186",
"-90",
"211",
"-100",
"183",
"-105",
"148",
"-10",
"140",
"188",
"92",
"374",
"-78",
"470",
"-351",
"548",
"-618",
"717"
] | [
"sign",
"changed"
] | 13 | 1 | 9 | null | null | Paul D. Hanna, Nov 24 2024 | 2025-04-26T06:25:05 | oeisdata/seq/A378/A378256.seq | eccf62aa37de12a4f1d532cbb532bff7 |
A378257 | G.f. A(x) satisfies A(x*A(x) - x^3*A'(x)) = x^2. | [
"1",
"1",
"1",
"3",
"13",
"65",
"387",
"2709",
"21673",
"195057",
"1950547",
"21456017",
"257472123",
"3347137599",
"46859925639",
"702898884585",
"11246382147523",
"191188496507891",
"3441392937086571",
"65386465804644849",
"1307729316092328701",
"27462315637938902721",
"604170944034649445339",
"13895931712796937242797"
] | [
"nonn"
] | 9 | 1 | 4 | null | null | Paul D. Hanna, Dec 04 2024 | 2024-12-06T11:09:54 | oeisdata/seq/A378/A378257.seq | a21d0a5f45014fb562d63e3a5107fd8a |
A378258 | G.f. satisfies A(x) = B(x) + 5*A(x)^2 where B(A(x) - A(x)^2) = x. | [
"1",
"3",
"22",
"219",
"2530",
"31830",
"422652",
"5820099",
"82226522",
"1183598754",
"17277560996",
"254957527134",
"3795103401236",
"56900877433356",
"858486641574392",
"13025190180880851",
"198640087778490698",
"3043793354165966442",
"46845889623804326292",
"723896233987491887466",
"11227150555314722435580"
] | [
"sign"
] | 6 | 1 | 2 | [
"A000108",
"A378258"
] | null | Paul D. Hanna, Dec 03 2024 | 2024-12-03T12:24:52 | oeisdata/seq/A378/A378258.seq | de795f6586d30ad339ae6db2c103e498 |
A378259 | G.f. satisfies A(x) = Sum_{n>=1} A(x^(2*n))/A(x^n), with A(0) = 0 and A'(0) = 1. | [
"1",
"2",
"14",
"32",
"286",
"480",
"3532",
"7520",
"75126",
"138560",
"897876",
"1997408",
"17039340",
"29800896",
"233106072",
"497063872",
"5068814502",
"10555899520",
"67510782340",
"148762640480",
"961465207492",
"1640373169344",
"14064469534248",
"31207376374080",
"312901302489020",
"640840797612416",
"4625855789637960",
"9196764841428416"
] | [
"nonn"
] | 13 | 1 | 2 | [
"A008683",
"A378259",
"A378262"
] | null | Paul D. Hanna, Dec 04 2024 | 2024-12-06T11:09:46 | oeisdata/seq/A378/A378259.seq | f17b4d0b4660cc1eb881fa7458aff62b |
A378260 | G.f. satisfies A(x) = A(x^2)/M(x), where M(x) = Sum_{n>=1} mu(n)*x^n and mu(n) = A008683(n), the Moebius function of n. | [
"1",
"1",
"3",
"4",
"11",
"15",
"33",
"50",
"104",
"161",
"309",
"500",
"929",
"1529",
"2757",
"4620",
"8207",
"13874",
"24353",
"41478",
"72327",
"123687",
"214685",
"368232",
"637430",
"1095201",
"1892492",
"3255372",
"5619323",
"9672701",
"16685587",
"28734098",
"49547095",
"85347087",
"147130261",
"253480414",
"436911525",
"752798677",
"1297444411",
"2235633198"
] | [
"nonn"
] | 12 | 1 | 3 | [
"A008683",
"A073776",
"A378260"
] | null | Paul D. Hanna, Nov 25 2024 | 2024-11-30T10:28:11 | oeisdata/seq/A378/A378260.seq | ce5b82d77a84680c7dec2d2091143c83 |
A378261 | G.f. satisfies A(x) = A(x^2)*M(x)/x, where M(x) = Sum_{n>=1} mu(n)*x^n and mu(n) = A008683(n), the Moebius function of n. | [
"1",
"-1",
"-2",
"1",
"-2",
"3",
"3",
"-2",
"0",
"1",
"5",
"-3",
"1",
"-6",
"-2",
"5",
"-5",
"-1",
"-1",
"1",
"10",
"-3",
"-18",
"4",
"0",
"6",
"-2",
"2",
"-7",
"3",
"10",
"-8",
"3",
"13",
"3",
"-4",
"-5",
"-1",
"16",
"-7",
"1",
"-21",
"-21",
"13",
"11",
"32",
"-3",
"-18",
"14",
"-12",
"27",
"-5",
"-29",
"-14",
"40",
"18",
"-9",
"-7",
"-28",
"-9",
"28",
"-12",
"-1",
"21",
"-18",
"-17",
"21",
"-4",
"2",
"-26",
"-55",
"15",
"6",
"57",
"76",
"4",
"-63",
"-35",
"-31",
"12",
"27"
] | [
"sign"
] | 15 | 0 | 3 | [
"A008683",
"A181439",
"A195589",
"A378260",
"A378261"
] | null | Paul D. Hanna, Nov 26 2024 | 2024-11-27T10:04:50 | oeisdata/seq/A378/A378261.seq | 7d0c671c9c0764b3b5398dec9270893e |
A378262 | G.f. satisfies A(x) = Sum_{n>=1} 2^(n-1) * A(x^(2*n))/A(x^n), with A(0) = 0 and A'(0) = 1. | [
"1",
"1",
"3",
"5",
"14",
"25",
"60",
"117",
"257",
"504",
"1053",
"2067",
"4197",
"8248",
"16491",
"32533",
"64919",
"128893",
"257923",
"515770",
"1036024",
"2080743",
"4185781",
"8411269",
"16893534",
"33867059",
"67793691",
"135460708",
"270330258",
"538950081",
"1074174949",
"2141296967",
"4271640535",
"8530158021",
"17054867115",
"34138204669",
"68398842318"
] | [
"nonn"
] | 9 | 1 | 3 | [
"A378259",
"A378262"
] | null | Paul D. Hanna, Dec 05 2024 | 2024-12-06T11:09:49 | oeisdata/seq/A378/A378262.seq | 8a44bbd81c943385fa5d08f471d3214f |
A378263 | G.f. A(x) satisfies A(x)^3 = A( x^3 + 3*x*A(x)^3 + 3*A(x)^5 ). | [
"1",
"1",
"3",
"11",
"45",
"197",
"903",
"4278",
"20780",
"102932",
"517958",
"2640351",
"13606108",
"70762223",
"370940297",
"1957904407",
"10396732686",
"55503069694",
"297713467184",
"1603715746235",
"8672044425182",
"47057000838629",
"256153441176310",
"1398399818307749",
"7654456055416611",
"42000841538172736",
"230983846994920144"
] | [
"nonn"
] | 7 | 1 | 3 | null | null | Paul D. Hanna, Nov 20 2024 | 2024-11-21T06:05:26 | oeisdata/seq/A378/A378263.seq | a0cfc9066039296d103214a475ffb3db |
A378264 | G.f. A(x) satisfies 1/x = Sum_{n=-oo..+oo} A(x)^n * (1 + A(x)^n)^(n+1). | [
"1",
"3",
"10",
"38",
"164",
"783",
"4005",
"21400",
"117602",
"659019",
"3748736",
"21588796",
"125646501",
"737977155",
"4369147468",
"26048215099",
"156249597852",
"942344615209",
"5710710976884",
"34756875588376",
"212361179832431",
"1302068876523950",
"8009024360554817",
"49407447276951470",
"305609996146288873",
"1895015255546957578"
] | [
"nonn"
] | 12 | 1 | 2 | [
"A166952",
"A378264",
"A379199",
"A379200",
"A379202",
"A379203",
"A379204",
"A379205"
] | null | Paul D. Hanna, Dec 08 2024 | 2024-12-20T23:38:00 | oeisdata/seq/A378/A378264.seq | d691a71eed3b9df9905c4894ceb033f3 |
A378265 | Terms k of A358657 such that lpf(k-1) and lpf(k+1) are twin primes pair, where lpf(k) = A020639(k) is the least prime dividing k. | [
"216",
"1591596",
"2046456",
"2051496",
"3108204",
"8933184",
"10496844",
"10630836",
"13579236",
"20866644",
"26666856",
"27288036",
"30398544",
"30538404",
"33949656",
"34851384",
"35722044",
"36657180",
"38588544",
"48634956",
"67747896",
"81982116",
"82130796",
"87172884",
"87865056",
"98639100",
"100473444"
] | [
"nonn",
"changed"
] | 12 | 1 | 1 | [
"A001097",
"A020639",
"A358657",
"A378265"
] | null | Amiram Eldar, Nov 21 2024 | 2025-04-26T01:44:32 | oeisdata/seq/A378/A378265.seq | 1e4356b4217cd3c70ad9103e334e0631 |
A378266 | Number of subgroups of S_n isomorphic to S_3 up to conjugacy, where S_n is the n-th symmetric group. | [
"0",
"0",
"1",
"1",
"2",
"4",
"5",
"7",
"10",
"12",
"15",
"20",
"23",
"28",
"34",
"39",
"45",
"54"
] | [
"nonn",
"hard",
"more"
] | 26 | 1 | 5 | [
"A004526",
"A378177",
"A378266",
"A378273",
"A378274"
] | null | Jianing Song, Nov 21 2024 | 2024-11-27T17:56:42 | oeisdata/seq/A378/A378266.seq | eb70bd71b87c0ef69e17a8aa637195c1 |
A378267 | Numbers k that have a record number of common divisors with sigma(k). | [
"1",
"6",
"24",
"120",
"672",
"4320",
"26208",
"30240",
"524160",
"2178540",
"8714160",
"8910720",
"17428320",
"45532800",
"132723360",
"208565280",
"240589440",
"470564640",
"668304000",
"1307124000",
"5228496000",
"10805558400",
"14182439040",
"31998395520",
"159991977600"
] | [
"nonn",
"more"
] | 5 | 1 | 2 | [
"A000005",
"A000203",
"A014567",
"A073802",
"A216793",
"A378267"
] | null | Amiram Eldar, Nov 21 2024 | 2024-11-21T05:40:27 | oeisdata/seq/A378/A378267.seq | 715954ce576c1407860387f69b111bef |
A378268 | Decimal expansion of Sum_{p prime} log(1+1/p)/(p*(p-1)). | [
"2",
"6",
"4",
"8",
"5",
"9",
"7",
"2",
"6",
"6",
"3",
"1",
"9",
"0",
"8",
"0",
"1",
"9",
"4",
"5",
"6",
"0",
"4",
"5",
"1",
"5",
"8",
"5",
"8",
"6",
"3",
"2",
"6",
"4",
"7",
"2",
"1",
"7",
"5",
"4",
"3",
"8",
"3",
"7",
"7",
"1",
"7",
"0",
"6",
"9",
"7",
"7",
"3",
"6",
"2",
"1",
"4",
"4",
"3",
"2",
"0",
"1",
"9",
"5",
"0",
"1",
"7",
"0",
"3",
"3",
"7",
"9",
"8",
"9",
"3",
"0",
"7",
"8",
"2",
"9",
"0",
"9",
"1",
"5",
"4",
"0",
"3",
"8",
"7",
"3",
"3",
"8",
"4",
"7",
"2",
"4",
"1",
"4",
"4",
"3",
"1",
"2",
"4",
"1",
"6"
] | [
"nonn",
"cons"
] | 6 | 0 | 1 | [
"A000005",
"A077761",
"A378268"
] | null | Amiram Eldar, Nov 21 2024 | 2024-11-21T03:01:07 | oeisdata/seq/A378/A378268.seq | 049b52bb43ca538425f3ea67ff7bc649 |
A378269 | Number of partitions of 1 into {1/1, 1/3, 1/5, ..., 1/(2*n-1)}. | [
"1",
"2",
"3",
"4",
"7",
"8",
"9",
"28",
"29",
"30",
"90",
"91",
"150",
"294",
"295",
"296",
"659",
"2818",
"2819",
"4815",
"4816",
"4817",
"26648",
"26649",
"38880",
"55745",
"55746",
"247660",
"322628",
"322629",
"322630",
"1942493",
"7597991",
"7597992"
] | [
"nonn",
"more"
] | 18 | 1 | 2 | [
"A005408",
"A020473",
"A038034",
"A378269"
] | null | Ilya Gutkovskiy, Nov 21 2024 | 2024-12-27T02:55:03 | oeisdata/seq/A378/A378269.seq | 07842331c666804dc60325e60a2c80c4 |
A378270 | Number of partitions of 1 into {1/1^2, 1/2^2, 1/3^2, ..., 1/n^2}. | [
"1",
"2",
"3",
"7",
"8",
"58",
"59",
"259",
"664",
"3427",
"3428",
"73351",
"73352",
"298785",
"7060868",
"43070304",
"43070305",
"901194373",
"901194374",
"32808600352",
"1204438945226",
"2459587779124",
"2459587779125",
"96010353352980"
] | [
"nonn",
"more"
] | 27 | 1 | 2 | [
"A000290",
"A020473",
"A038034",
"A348625",
"A378270",
"A378271"
] | null | Ilya Gutkovskiy, Nov 21 2024 | 2024-12-12T09:28:15 | oeisdata/seq/A378/A378270.seq | f957b60f972947014d3ae924e0399e8d |
A378271 | Number of partitions of 1 into {1/1^3, 1/2^3, 1/3^3, ..., 1/n^3}. | [
"1",
"2",
"3",
"11",
"12",
"435",
"436",
"6748",
"42360",
"1252676",
"1252677",
"302302546",
"302302547"
] | [
"nonn",
"more"
] | 11 | 1 | 2 | [
"A000578",
"A020473",
"A038034",
"A378270",
"A378271"
] | null | Ilya Gutkovskiy, Nov 21 2024 | 2024-12-11T11:34:44 | oeisdata/seq/A378/A378271.seq | ec29f08c3774be1d4bd9913c075362cb |
A378272 | The smallest number whose divisor set mod p has p elements with p = prime(n). | [
"2",
"6",
"40",
"84",
"990",
"936",
"5100",
"8208",
"12420",
"48720",
"37200",
"139860",
"196800",
"216720",
"118440",
"648720",
"2180640",
"1024800",
"1857240",
"2385600",
"2522880",
"4180680",
"3884400",
"9868320",
"17599680",
"21816000",
"16315200",
"18874800",
"51273600",
"34171200",
"48646080",
"120163680",
"110674080"
] | [
"nonn"
] | 34 | 1 | 1 | [
"A000040",
"A280171",
"A378272"
] | null | Michel Lagneau, Nov 21 2024 | 2025-01-27T09:59:30 | oeisdata/seq/A378/A378272.seq | 9a9dab9d6802ed79faaa0d77ec705a8d |
A378273 | Number of subgroups of S_n isomorphic to S_4 up to conjugacy, where S_n is the n-th symmetric group. | [
"0",
"0",
"0",
"1",
"1",
"4",
"5",
"10",
"13",
"22",
"27",
"47",
"56",
"84",
"104",
"147",
"175",
"250"
] | [
"nonn",
"hard",
"more"
] | 7 | 1 | 6 | [
"A004526",
"A378177",
"A378266",
"A378273",
"A378274"
] | null | Jianing Song, Nov 21 2024 | 2024-11-27T17:56:38 | oeisdata/seq/A378/A378273.seq | 91f736b669d541ca70dce152341cca4b |
A378274 | Number of subgroups of S_n isomorphic to S_5 up to conjugacy, where S_n is the n-th symmetric group. | [
"0",
"0",
"0",
"0",
"1",
"2",
"3",
"4",
"5",
"9",
"11",
"17",
"19",
"25",
"31",
"40",
"48",
"59"
] | [
"nonn",
"hard",
"more"
] | 7 | 1 | 6 | [
"A004526",
"A378177",
"A378266",
"A378273",
"A378274"
] | null | Jianing Song, Nov 21 2024 | 2024-11-27T17:56:33 | oeisdata/seq/A378/A378274.seq | bd12da38fa9cd6aba3964ad8545534cf |
A378275 | Numbers m which satisfy the equation: (m - floor((m - k)/k)) mod k = 1 (1 <= k <= m) only for k = 2 and m - 1. | [
"3",
"4",
"7",
"11",
"19",
"23",
"59",
"83",
"167",
"227",
"491",
"659",
"839",
"983",
"1019",
"1091",
"1319",
"1459",
"1523",
"1847",
"2179",
"2503",
"2963",
"3719",
"3767",
"4519",
"4871",
"4919",
"5059",
"6563",
"9239",
"9419",
"10883",
"12107",
"12539",
"14891",
"15383",
"20071",
"20747",
"23819",
"25219",
"26759",
"33851",
"35591",
"37379",
"45191"
] | [
"nonn"
] | 8 | 1 | 1 | [
"A000040",
"A048158",
"A051731",
"A375007",
"A375595",
"A378275"
] | null | Lechoslaw Ratajczak, Nov 21 2024 | 2025-01-15T08:40:28 | oeisdata/seq/A378/A378275.seq | 707a7a883f93c99adfbf0f8bdd2568a5 |
A378276 | Cogrowth sequence of the 20-element dicyclic group Dic20 = <S,T | S^5, T^4, STST^3>. | [
"1",
"0",
"0",
"0",
"1",
"0",
"6",
"7",
"19",
"9",
"61",
"88",
"226",
"377",
"945",
"1473",
"3427",
"6154",
"13758",
"25327",
"53967",
"102865",
"213345",
"411700",
"849706",
"1661885",
"3382821",
"6668577",
"13493719",
"26725414",
"53861446",
"107074403",
"215261971",
"428704177",
"860266725",
"1715950208",
"3439229842",
"6866462849"
] | [
"nonn",
"easy"
] | 5 | 0 | 7 | [
"A078789",
"A377656",
"A378254",
"A378276",
"A378278",
"C10",
"C2",
"D10"
] | null | Sean A. Irvine, Nov 21 2024 | 2024-11-21T16:05:32 | oeisdata/seq/A378/A378276.seq | 45cd689f57da92a833adc91541aae354 |
A378277 | Denominators in a harmonic triangle, based on products of Fibonacci numbers. | [
"1",
"2",
"2",
"2",
"3",
"6",
"2",
"3",
"10",
"15",
"2",
"3",
"10",
"24",
"40",
"2",
"3",
"10",
"24",
"65",
"104",
"2",
"3",
"10",
"24",
"65",
"168",
"273",
"2",
"3",
"10",
"24",
"65",
"168",
"442",
"714",
"2",
"3",
"10",
"24",
"65",
"168",
"442",
"1155",
"1870",
"2",
"3",
"10",
"24",
"65",
"168",
"442",
"1155",
"3026",
"4895",
"2",
"3",
"10",
"24",
"65",
"168",
"442",
"1155",
"3026",
"7920",
"12816"
] | [
"nonn",
"easy",
"tabl",
"frac"
] | 5 | 1 | 2 | [
"A000045",
"A001654",
"A059929",
"A110034",
"A110035",
"A378277"
] | null | Werner Schulte, Nov 21 2024 | 2024-12-08T17:12:17 | oeisdata/seq/A378/A378277.seq | 9434fb900a30cf9b7a34bc13ee4f7566 |
A378278 | Cogrowth sequence of the 20-element Frobenius group Frob20 = <S,T | S^5, T^4, (ST)^4>. | [
"1",
"0",
"0",
"0",
"1",
"1",
"3",
"7",
"15",
"27",
"51",
"99",
"199",
"403",
"819",
"1651",
"3303",
"6579",
"13107",
"26163",
"52327",
"104755",
"209715",
"419635",
"839271",
"1678131",
"3355443",
"6710067",
"13420135",
"26841907",
"53687091",
"107377459",
"214754919",
"429503283",
"858993459",
"1717973811",
"3435947623"
] | [
"nonn",
"easy"
] | 4 | 0 | 7 | [
"A078789",
"A378254",
"A378276",
"A378278",
"C10",
"C2",
"D10"
] | null | Sean A. Irvine, Nov 21 2024 | 2024-11-21T16:05:36 | oeisdata/seq/A378/A378278.seq | c88a7880fe58589e6fdd85fd4df16b38 |
A378279 | Number of subgroups of S_n isomorphic to S_3, where S_n is the n-th symmetric group. | [
"0",
"0",
"1",
"4",
"20",
"160",
"910",
"5936",
"53424",
"397440",
"3304620",
"35023120",
"322852816"
] | [
"nonn",
"hard",
"more"
] | 12 | 1 | 4 | [
"A000085",
"A281097",
"A378163",
"A378279",
"A378280",
"A378281"
] | null | Jianing Song, Nov 21 2024 | 2024-11-27T12:33:36 | oeisdata/seq/A378/A378279.seq | 25ed4c90e0d1bc4af8c00d9e8dd5e367 |
A378280 | Number of subgroups of S_n isomorphic to S_4, where S_n is the n-th symmetric group. | [
"0",
"0",
"0",
"1",
"5",
"60",
"560",
"5740",
"58716",
"734160",
"8337120",
"133212420",
"1769490580"
] | [
"nonn",
"hard",
"more"
] | 11 | 1 | 5 | [
"A000085",
"A378163",
"A378279",
"A378280",
"A378281"
] | null | Jianing Song, Nov 21 2024 | 2024-11-27T12:33:31 | oeisdata/seq/A378/A378280.seq | bbeaeabb47ff83cab67997a0a4579372 |
A378281 | Number of subgroups of S_n isomorphic to S_5, where S_n is the n-th symmetric group. | [
"0",
"0",
"0",
"0",
"1",
"12",
"84",
"560",
"3276",
"79632",
"1105104",
"16571808",
"176344740"
] | [
"nonn",
"hard",
"more"
] | 11 | 1 | 6 | [
"A000085",
"A378163",
"A378279",
"A378280",
"A378281"
] | null | Jianing Song, Nov 21 2024 | 2024-11-27T12:33:13 | oeisdata/seq/A378/A378281.seq | aeceda0c32f764a0a22f45fc5e1fcf87 |
A378282 | Irregular triangular T: (row 1) = (1); (row n+1) = inverse runlength sequence of row n, starting with 2 if r = 3k for some k, and 1 otherwise. See Comments. | [
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"2",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"2",
"1"
] | [
"nonn",
"tabf"
] | 11 | 1 | 3 | [
"A270641",
"A378282",
"A378284",
"A378285",
"A378286"
] | null | Clark Kimberling, Dec 08 2024 | 2024-12-27T09:28:07 | oeisdata/seq/A378/A378282.seq | 3fd969bf2cebbcffe34ef9c4a04491c7 |
A378283 | Unique sequence s starting with 1,1,2,1 such that if r(r(r(s) = s and r(s) != s and r(r(s) != s, where r(#) denotes the runlength sequence of a sequence #. | [
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1"
] | [
"nonn"
] | 4 | 1 | 3 | [
"A378282",
"A378283",
"A378284",
"A378285",
"A378286",
"A378303"
] | null | Clark Kimberling, Dec 16 2024 | 2024-12-20T11:59:12 | oeisdata/seq/A378/A378283.seq | 3b47f62b3aeb211f5f3c8ced58a65f50 |
A378284 | Unique sequence s starting with 1,2,1 such that if r(r(r(s) = s and r(s) != s and r(r(s) != s, where r(#) denotes the runlength sequence of a sequence #. | [
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"2"
] | [
"nonn"
] | 4 | 1 | 2 | [
"A378282",
"A378283",
"A378284",
"A378285",
"A378286",
"A378303"
] | null | Clark Kimberling, Dec 20 2024 | 2024-12-21T01:05:19 | oeisdata/seq/A378/A378284.seq | 1f3c90335e23c209cd591b0f72311e7d |
A378285 | Unique sequence s starting with 2,1 such that if r(r(r(s))) = s and r(s) != s and r(r(s)) != s, where r(#) denotes the runlength sequence of a sequence #. | [
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
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"2",
"1",
"2",
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"2",
"1",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"1"
] | [
"nonn"
] | 7 | 1 | 1 | [
"A378282",
"A378283",
"A378284",
"A378285",
"A378286",
"A378303"
] | null | Clark Kimberling, Dec 20 2024 | 2024-12-21T02:16:39 | oeisdata/seq/A378/A378285.seq | aef8f9fc3204c9fa21bf5ac152d4b524 |
A378286 | a(n) = number of terms in row n of the array A378282. | [
"1",
"1",
"1",
"2",
"2",
"3",
"4",
"5",
"7",
"11",
"16",
"23",
"35",
"51",
"75",
"113",
"168",
"249",
"374",
"560",
"840",
"1262",
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"2844",
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"32449",
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"164334",
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"554686",
"832046",
"1248073",
"1872168",
"2808326",
"4212710",
"6319089",
"9478842"
] | [
"nonn"
] | 4 | 1 | 4 | [
"A378282",
"A378286"
] | null | Clark Kimberling, Dec 20 2024 | 2024-12-21T01:05:39 | oeisdata/seq/A378/A378286.seq | 113bc9d55c2653d8b3b10963d7758944 |
A378287 | Numbers not of the form m^k for some k>=3. Complement of A076467. | [
"2",
"3",
"4",
"5",
"6",
"7",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"17",
"18",
"19",
"20",
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"22",
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"24",
"25",
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"42",
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"48",
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"53",
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"55",
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"58",
"59",
"60",
"61",
"62",
"63",
"65",
"66",
"67",
"68",
"69",
"70",
"71",
"72",
"73"
] | [
"nonn",
"easy"
] | 7 | 1 | 1 | [
"A076467",
"A362147",
"A378287"
] | null | Chai Wah Wu, Nov 21 2024 | 2024-11-21T22:28:03 | oeisdata/seq/A378/A378287.seq | ee6aa982e2adc6d4d153edc7764ce893 |
A378288 | Array read by antidiagonals: row k consists of the positive integers j for which the concatenation of 2^k - 1 and 2^j - 1 is prime. | [
"1",
"2",
"1",
"3",
"3",
"1",
"5",
"5",
"2",
"1",
"6",
"9",
"7",
"3",
"1",
"9",
"15",
"10",
"5",
"2",
"1",
"13",
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"11",
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"3",
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"101",
"125",
"7",
"5",
"13",
"43",
"303",
"62",
"65",
"13",
"157",
"150",
"9",
"11",
"27",
"3",
"46",
"425",
"70",
"227",
"23",
"367",
"195",
"11",
"14",
"43",
"14",
"11"
] | [
"nonn",
"base",
"tabl"
] | 24 | 1 | 2 | [
"A000225",
"A301806",
"A378288"
] | null | Robert Israel, Nov 26 2024 | 2024-11-27T18:58:32 | oeisdata/seq/A378/A378288.seq | 4c993bc4c189ba66510cc69b389ec0a8 |
A378289 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n+r+k,r) * binomial(r,n-r)/(n+r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"1",
"0",
"1",
"2",
"3",
"0",
"1",
"3",
"7",
"10",
"0",
"1",
"4",
"12",
"26",
"38",
"0",
"1",
"5",
"18",
"49",
"105",
"154",
"0",
"1",
"6",
"25",
"80",
"210",
"444",
"654",
"0",
"1",
"7",
"33",
"120",
"363",
"927",
"1944",
"2871",
"0",
"1",
"8",
"42",
"170",
"575",
"1672",
"4191",
"8734",
"12925",
"0",
"1",
"9",
"52",
"231",
"858",
"2761",
"7810",
"19305",
"40040",
"59345",
"0"
] | [
"nonn",
"tabl"
] | 16 | 0 | 8 | [
"A000007",
"A001002",
"A009766",
"A026300",
"A052703",
"A052706",
"A378289",
"A378290",
"A378291",
"A378292"
] | null | Seiichi Manyama, Nov 21 2024 | 2024-11-22T08:30:21 | oeisdata/seq/A378/A378289.seq | 53c5b2578c072280af2c50b4f053d676 |
A378290 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n+2*r+k,r) * binomial(r,n-r)/(n+2*r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"1",
"0",
"1",
"2",
"4",
"0",
"1",
"3",
"9",
"19",
"0",
"1",
"4",
"15",
"46",
"104",
"0",
"1",
"5",
"22",
"82",
"262",
"614",
"0",
"1",
"6",
"30",
"128",
"486",
"1588",
"3816",
"0",
"1",
"7",
"39",
"185",
"789",
"3027",
"10053",
"24595",
"0",
"1",
"8",
"49",
"254",
"1185",
"5052",
"19543",
"65686",
"162896",
"0",
"1",
"9",
"60",
"336",
"1689",
"7801",
"33290",
"129606",
"439658",
"1101922",
"0"
] | [
"nonn",
"tabl"
] | 13 | 0 | 8 | [
"A000007",
"A009766",
"A026300",
"A186997",
"A218045",
"A378289",
"A378290",
"A378291",
"A378292"
] | null | Seiichi Manyama, Nov 21 2024 | 2024-11-22T08:31:00 | oeisdata/seq/A378/A378290.seq | 562d988008294c163b9043b9f6e2d7d1 |
A378291 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(3*n-2*r+k,r) * binomial(r,n-r)/(3*n-2*r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"1",
"0",
"1",
"2",
"2",
"0",
"1",
"3",
"5",
"6",
"0",
"1",
"4",
"9",
"16",
"20",
"0",
"1",
"5",
"14",
"31",
"56",
"72",
"0",
"1",
"6",
"20",
"52",
"114",
"208",
"273",
"0",
"1",
"7",
"27",
"80",
"201",
"438",
"806",
"1073",
"0",
"1",
"8",
"35",
"116",
"325",
"800",
"1739",
"3220",
"4333",
"0",
"1",
"9",
"44",
"161",
"495",
"1341",
"3260",
"7077",
"13168",
"17869",
"0"
] | [
"nonn",
"tabl"
] | 11 | 0 | 8 | [
"A000007",
"A009766",
"A026300",
"A186996",
"A378237",
"A378289",
"A378290",
"A378291",
"A378292"
] | null | Seiichi Manyama, Nov 21 2024 | 2024-11-22T08:31:12 | oeisdata/seq/A378/A378291.seq | 991185a9b7e97afba50f15e7159f0440 |
A378292 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(2*n+k,r) * binomial(r,n-r)/(2*n+k) for k > 0. | [
"1",
"1",
"0",
"1",
"1",
"0",
"1",
"2",
"3",
"0",
"1",
"3",
"7",
"11",
"0",
"1",
"4",
"12",
"28",
"46",
"0",
"1",
"5",
"18",
"52",
"123",
"207",
"0",
"1",
"6",
"25",
"84",
"240",
"572",
"979",
"0",
"1",
"7",
"33",
"125",
"407",
"1155",
"2769",
"4797",
"0",
"1",
"8",
"42",
"176",
"635",
"2028",
"5733",
"13806",
"24138",
"0",
"1",
"9",
"52",
"238",
"936",
"3276",
"10332",
"29136",
"70414",
"123998",
"0"
] | [
"nonn",
"tabl"
] | 13 | 0 | 8 | [
"A000007",
"A006605",
"A009766",
"A026300",
"A143927",
"A378289",
"A378290",
"A378291",
"A378292"
] | null | Seiichi Manyama, Nov 21 2024 | 2024-11-22T08:31:06 | oeisdata/seq/A378/A378292.seq | 8e11db1e1e0bbe42659a7776e0f9f194 |
A378293 | a(1) = 1. For n > 1 if a(n-1) is a novel term a(n) = number of a(i); 1 <= i <= n-1 whose sum of decimal digits does not exceed A007953(a(n-1)). If a(n-1) has occurred k (>1) times, a(n) = k*a(n-1). | [
"1",
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"3",
"6",
"12",
"7",
"14",
"10",
"20",
"6",
"18",
"20",
"40",
"12",
"24",
"19",
"25",
"22",
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"28",
"29",
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"12",
"36",
"30",
"60",
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"50",
"21",
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"23",
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"48",
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"80",
"38",
"48",
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"34",
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"54",
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"50",
"100",
"5",
"10",
"30",
"90",
"52",
"45",
"90",
"180",
"56",
"112"
] | [
"nonn",
"base",
"easy"
] | 17 | 1 | 3 | [
"A007953",
"A378293",
"A378782"
] | null | David James Sycamore, Nov 22 2024 | 2024-12-10T11:18:54 | oeisdata/seq/A378/A378293.seq | 00ed236be99e158c8f29ad56228b31e6 |
A378294 | Nonnegative norms of ideals in Q(sqrt(10), sqrt(26)). | [
"0",
"1",
"2",
"4",
"5",
"8",
"9",
"10",
"13",
"16",
"18",
"20",
"25",
"26",
"32",
"36",
"37",
"40",
"45",
"49",
"50",
"52",
"64",
"65",
"67",
"72",
"74",
"79",
"80",
"81",
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"90",
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"100",
"104",
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"121",
"125",
"128",
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"134",
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"148",
"158",
"160",
"162",
"163",
"166",
"169",
"180",
"185",
"191",
"196",
"197",
"199",
"200",
"208",
"225",
"227",
"234",
"242",
"245",
"250"
] | [
"nonn"
] | 17 | 0 | 3 | [
"A378294",
"A378295"
] | null | Jovan Radenkovicc, Nov 22 2024 | 2024-11-28T13:29:17 | oeisdata/seq/A378/A378294.seq | 3a35f2ceadeb3b3f05ebf2418470e830 |
A378295 | Prime norms of ideals in Q(sqrt(10), sqrt(26)). | [
"2",
"5",
"13",
"37",
"67",
"79",
"83",
"163",
"191",
"197",
"199",
"227",
"293",
"307",
"311",
"317",
"397",
"439",
"521",
"557",
"569",
"587",
"599",
"601",
"613",
"641",
"643",
"683",
"719",
"733",
"751",
"773",
"787",
"809",
"827",
"853",
"877",
"881",
"911",
"919",
"947",
"991",
"1031",
"1039",
"1049",
"1123",
"1163",
"1231",
"1237",
"1249",
"1307",
"1361",
"1373",
"1439",
"1481",
"1493"
] | [
"nonn"
] | 12 | 1 | 1 | [
"A038879",
"A038899",
"A038945",
"A378294",
"A378295"
] | null | Jovan Radenkovicc, Nov 22 2024 | 2024-11-28T13:30:07 | oeisdata/seq/A378/A378295.seq | 6ada4cebd73360db2fbeb6d88592b7bd |
A378296 | Number of cyclic edge cuts in the n-ladder graph. | [
"0",
"0",
"0",
"1",
"32",
"612",
"9160",
"118608",
"1395872",
"15356032"
] | [
"nonn",
"more"
] | 14 | 1 | 5 | null | null | Eric W. Weisstein, Nov 22 2024 | 2024-12-04T09:14:15 | oeisdata/seq/A378/A378296.seq | 485d5bac491d37c563a0a2693add24f5 |
A378297 | Squarefree semiprimes k that remain squarefree semiprimes for exactly two iterations of the map k -> 2*k+1. | [
"38",
"46",
"106",
"129",
"133",
"201",
"235",
"334",
"335",
"381",
"417",
"458",
"489",
"538",
"579",
"583",
"597",
"623",
"626",
"685",
"689",
"694",
"767",
"781",
"898",
"921",
"1073",
"1082",
"1099",
"1214",
"1226",
"1227",
"1234",
"1285",
"1299",
"1315",
"1385",
"1486",
"1514",
"1517",
"1546",
"1603",
"1631",
"1646",
"1799",
"1817",
"1819",
"1841"
] | [
"nonn",
"easy"
] | 21 | 1 | 1 | [
"A006881",
"A177221",
"A378297"
] | null | Paul Duckett, Nov 22 2024 | 2024-12-23T02:16:59 | oeisdata/seq/A378/A378297.seq | a3039a74e8d52090f676cfcd6152ba65 |
A378298 | Number of solutions that satisfy the congruence: i^2 == j^2 (mod n) with 1 <= i < j <= n. | [
"0",
"0",
"1",
"2",
"2",
"2",
"3",
"8",
"6",
"4",
"5",
"14",
"6",
"6",
"15",
"24",
"8",
"12",
"9",
"26",
"22",
"10",
"11",
"48",
"20",
"12",
"27",
"38",
"14",
"30",
"15",
"64",
"36",
"16",
"41",
"66",
"18",
"18",
"43",
"88",
"20",
"44",
"21",
"62",
"72",
"22",
"23",
"136",
"42",
"40",
"57",
"74",
"26",
"54",
"67",
"128",
"64",
"28",
"29",
"150",
"30",
"30",
"105",
"160",
"80",
"72",
"33",
"98"
] | [
"nonn"
] | 62 | 1 | 4 | [
"A000079",
"A000217",
"A036289",
"A060594",
"A373749",
"A378298"
] | null | Darío Clavijo, Nov 22 2024 | 2024-11-28T19:24:55 | oeisdata/seq/A378/A378298.seq | 491f1c3237a5280bfeddfc122ec2160d |
A378299 | Read the binary representation of n from the most to least significant bit then perform a cumulative XOR and store by reading from least to most significant bit. | [
"0",
"1",
"1",
"2",
"1",
"6",
"2",
"5",
"1",
"14",
"6",
"9",
"2",
"13",
"5",
"10",
"1",
"30",
"14",
"17",
"6",
"25",
"9",
"22",
"2",
"29",
"13",
"18",
"5",
"26",
"10",
"21",
"1",
"62",
"30",
"33",
"14",
"49",
"17",
"46",
"6",
"57",
"25",
"38",
"9",
"54",
"22",
"41",
"2",
"61",
"29",
"34",
"13",
"50",
"18",
"45",
"5",
"58",
"26",
"37",
"10",
"53",
"21",
"42",
"1",
"126",
"62",
"65",
"30",
"97",
"33",
"94"
] | [
"nonn",
"base",
"look"
] | 48 | 0 | 4 | [
"A000051",
"A000079",
"A000225",
"A000975",
"A006068",
"A007283",
"A030101",
"A095121",
"A378299",
"A380001"
] | null | Darío Clavijo, Nov 22 2024 | 2025-01-11T14:06:02 | oeisdata/seq/A378/A378299.seq | bdd5a840fbc72931d7dada3bb9ce4ce1 |
A378300 | Number of NPN-equivalence classes of balanced monotone Boolean functions of n or fewer variables. | [
"1",
"1",
"2",
"4",
"15",
"581"
] | [
"nonn",
"hard",
"more"
] | 10 | 1 | 3 | [
"A000372",
"A003183",
"A037293",
"A341633",
"A378300"
] | null | Aniruddha Biswas, Nov 22 2024 | 2024-12-10T19:58:42 | oeisdata/seq/A378/A378300.seq | 01bae52622d2b878495b502c7576f5ba |
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